public ExportedSecretKey(SecretKeyInfo keyInfo, /*ScryptInput secretInfo,*/ Encryption encryption)
{
KeyInfo = keyInfo;
//SecretInfo = secretInfo;
_encryption = encryption;
}
public static Task <SecretKey> NewSecretKey(SecretKeyInfo keyInfo, byte[] data)
{
return(Task.Run(() =>
{
// scrypt the data
var result = ScryptEncoder.Encode(data);
// get 16 bytes of the result and scyrpt it again
var idData = new byte[16];
Buffer.BlockCopy(result.Hash, 8, idData, 0, idData.Length);
var idResult = ScryptEncoder.Encode(idData, result.IterationCount, result.BlockSize, result.ThreadCount, result.Salt);
// use 8 bytes for id
var id = BitConverter.ToUInt64(idResult.Hash, idData.Length);
keyInfo.SecretId = id;
return new SecretKey(keyInfo, result);
}));
}
public static Task <SecretKey> NewSecretKey(SecretKeyInfo keyInfo, string password)
{
return(Task.Run(() =>
{
var pw = Encoding.UTF8.GetBytes(password);
var iterations = Math.Abs(GetHashCode(pw)) % 100000;
retry:
var sha512 = new SHA512Managed();
var hash = sha512.ComputeHash(pw);
for (var i = 0; i < iterations; i++)
{
hash = sha512.ComputeHash(hash);
}
var control = sha512.ComputeHash(pw);
for (var i = 0; i < iterations; i++)
{
control = sha512.ComputeHash(control);
}
if (!hash.SequenceEqual(control))
{
goto retry;
}
var data = new byte[32];
var salt = new byte[32];
Buffer.BlockCopy(hash, 0, data, 0, 32);
Buffer.BlockCopy(hash, 32, salt, 0, 32);
return NewSecretKey(keyInfo, data, salt);
}));
}
public ExportedSecretKey(Unpacker unpacker)
{
KeyInfo = SecretKeyInfo.Restore(unpacker);
//SecretInfo = new ScryptInput(unpacker);
_encryption = Encryption.Restore(new ArraySegment <byte>(unpacker.UnpackByteArray()));
}
public SecretKey(SecretKeyInfo keyInfo, /*ScryptInput scryptInfo,*/ byte[] secretHash)
{
KeyInfo = keyInfo;
//SecretInfo = scryptInfo;
SecretHash = secretHash;
}
SecretKey(SecretKeyInfo keyInfo, ScryptResult secret)
{
KeyInfo = keyInfo;
//SecretInfo = secret.Input;
SecretHash = secret.Hash;
}
public SecretKey(Unpacker unpacker)
{
KeyInfo = SecretKeyInfo.Restore(unpacker);
//SecretInfo = new ScryptInput(unpacker);
unpacker.Unpack(out SecretHash);
}
